#include <Eigen/Dense>
#include <iostream>

using namespace Eigen;
using namespace std;

int
main()
{
	ArrayXXf a(2, 2);
	ArrayXXf b(2, 2);
	a << 1, 2, 3, 4;
	b << 5, 6, 7, 8;
	cout << "a * b = " << endl << a * b << endl;
}
